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SmartDengg/GalleryFolderActivity.java

Created April 20, 2016 10:30
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GalleryFolderActivity.java
package com.smartdengg.smartgallery.activity;
import android.content.Intent;
import android.database.Cursor;
import android.os.Bundle;
import android.provider.MediaStore;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.StaggeredGridLayoutManager;
import butterknife.Bind;
import butterknife.ButterKnife;
import com.smartdengg.smartgallery.R;
import com.smartdengg.smartgallery.adapter.GalleryImageAdapter;
import com.smartdengg.smartgallery.entity.FolderEntity;
import com.smartdengg.smartgallery.manager.SchedulersCompat;
import com.smartdengg.smartgallery.ui.MarginDecoration;
import java.util.List;
import rx.Observable;
import rx.Subscriber;
import rx.functions.Action0;
import rx.functions.Func1;
import rx.subscriptions.CompositeSubscription;
import rx.subscriptions.Subscriptions;
/**
* Created by SmartDengg on 2016/3/5.
*/
public class GalleryFolderActivity extends AppCompatActivity {
private static final String COLUMN_NAME_COUNT = "v_count";
private static String[] mediaColumns = new String[] {
MediaStore.Images.Media.BUCKET_DISPLAY_NAME, MediaStore.Images.Media.DATA, "COUNT(*) AS " + COLUMN_NAME_COUNT
};
private static String selection = " 1=1 ) GROUP BY (" + MediaStore.Images.Media.BUCKET_DISPLAY_NAME;
@NonNull @Bind(R.id.folder_layout_rv) protected RecyclerView recyclerView;
private GalleryImageAdapter folderAdapter;
private FolderEntity folderEntity = new FolderEntity();
private CompositeSubscription compositeSubscription = new CompositeSubscription();
public static void navigateToGalleryFolder(AppCompatActivity startingActivity) {
startingActivity.startActivity(new Intent(startingActivity, GalleryFolderActivity.class));
}
@Override protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_folder_layout);
ButterKnife.bind(GalleryFolderActivity.this);
GalleryFolderActivity.this.initView();
GalleryFolderActivity.this.initData();
}
private void initView() {
this.folderAdapter = new GalleryImageAdapter(GalleryFolderActivity.this);
this.recyclerView.addItemDecoration(new MarginDecoration(GalleryFolderActivity.this));
this.recyclerView.setHasFixedSize(true);
this.recyclerView.setLayoutManager(new StaggeredGridLayoutManager(2, StaggeredGridLayoutManager.VERTICAL));
this.recyclerView.setAdapter(folderAdapter);
}
private void initData() {
compositeSubscription.add(Observable.create(new Observable.OnSubscribe<Cursor>() {
@Override public void call(Subscriber<? super Cursor> subscriber) {
final Cursor cursor = GalleryFolderActivity.this
.getContentResolver()
.query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, mediaColumns, selection, null, null);
subscriber.add(Subscriptions.create(new Action0() {
@Override public void call() {
if (cursor != null && !cursor.isClosed()) {
cursor.close();
}
}
}));
if (!subscriber.isUnsubscribed()) {
if (cursor == null) {
Observable.error(new NullPointerException("cursor must not be null"));
} else {
while (cursor.moveToNext()) {
if (cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.DATA)).endsWith(".gif")) {
continue;
}
subscriber.onNext(cursor);
}
cursor.close();
subscriber.onCompleted();
}
}
}
}).map(new Func1<Cursor, FolderEntity>() {
@Override public FolderEntity call(Cursor cursor) {
String thumbUrl = cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.DATA));
String folderName = cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.BUCKET_DISPLAY_NAME));
int imageCount = cursor.getInt(cursor.getColumnIndex(COLUMN_NAME_COUNT));
FolderEntity clone = folderEntity.newInstance();
clone.setThumbPath(thumbUrl);
clone.setFolderName(folderName);
return clone;
}
}).toList().compose(SchedulersCompat.<List<FolderEntity>>applyIoSchedulers()).subscribe());
}
@Override protected void onDestroy() {
super.onDestroy();
ButterKnife.unbind(GalleryFolderActivity.this);
if (compositeSubscription.hasSubscriptions() && compositeSubscription.isUnsubscribed()) {
this.compositeSubscription.clear();
}
}
}
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